Alert archive / Florida / Special Weather Statements in 2012

Special Weather Statement, NWS Melbourne, FL

August 17, 2012Lake County, Florida

NWS Melbourne, FL issued this special weather statement at Aug 17, 2012, 12:33 PM EDT for Lake County, Florida. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 17, 2012, 12:33 PM EDT (16:33 UTC)
Expired: Aug 17, 2012, 1:15 PM EDT
In force: 42 min
Issued by: NWS Melbourne, FL

County Lake County, FL

The radar

The Tampa radar (KTBW), 101 km from the middle of the area, began a volume at 16:33 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 4.6 hours before the alert went out and 121 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 921 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 1009 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 14 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Melbourne, FL wrote its last area forecast discussion before this special weather statement went out at Aug 17, 10:20 AM EDT, 2 hours 13 minutes earlier.

Area forecast discussion, Aug 17, 10:20 AM EDT, 2 hours 13 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MELBOURNE FL
1020 AM EDT FRI AUG 17 2012

.DISCUSSION...

MORNING ANALYSIS SHOWS A VERTICALLY STACKED ATLC RIDGE AXIS OVER S
FL INTERACTING WITH A BROAD TROFFING PATTERN OVER THE ERN SEABOARD
TO GENERATE A DEEP W/SW FLOW ACRS THE CENTRAL PENINSULA. MOISTURE
IS PLENTIFUL WITH PWAT VALUES AT KJAX/KTBW/KXMR BTWN 1.9"-2.0"...
DECREASING TO 1.8" AT KMFL...SFC DEWPOINTS IN THE M/U70S AREAWIDE.
STRONGER PGRAD/LOW LVL WINDS OVER THE N HALF OF THE PENINSULA SHOULD
OVERPOWER THE EAST COAST SEA BREEZE N OF CAPE CANAVERAL OR AT LEAST
KEEP IT PINNED ON THE IMMEDIATE COAST. WEAKER PGRAD S OF THE CAPE
WILL ALLOW THE SEABREEZE TO PUSH FURTHER INLAND...BUT NOT MUCH
FARTHER THAN THE I-95 CORRIDOR.

OVERALL CONDITIONS ARE FAVORABLE FOR ANOTHER ROUND OF AFTN/EVNG
TSTMS ACRS CENTRAL FL WITH THE WRLY FLOW PACKING THE ACTIVITY OVER
THE CWA. ONE CONCERN IS THE TSTM CLUSTER OVER THE NE GOMEX AND ITS
POTENTIAL TO GENERATE DEBRIS CLOUDS THAT WOULD HAMPER SFC HEATING
AND DESTABILIZATION. HOWEVER...THE KJAX/KTBW SOUNDING SHOW NO MID
LVL CAPPING WITH CONVECTIVE TEMPS IN THE 89-92F RANGE. MID MORNING
TEMPS ARE ALREADY IN THE M80S...SO SUFFICIENT ENERGY FOR FREE
CONVECTION SHOULD BUILD UP BEFORE ANY DEBRIS CLOUDS MOVE IN.

THE 50/40 NORTH/SOUTH POP DISTRIBUTION LOOKS GOOD GIVEN THE TROF TO
THE N AND THE SLIGHT DECREASE IN MOISTURE TO THE S. NO SIG CHANGES
NECESSARY OTHER THAN MINOR TWEAKS TO THE WINDS.

&&

.AVIATION...
THRU 17/17Z...VFR ALL SITES. BTWN 17/17Z-17/19Z...CSTL SITES S OF
KTIX SFC WNDSHFT FM W/SW TO SE ASSOCD WITH THE EAST COAST SEA
BREEZE...SCT IFR/ISOLD LIFR TSRAS DVLPG AREAWIDE AND CONTG INTO THE
18/00Z TAF CYCLE. BTWN 18/00Z-18/03Z...TSRAS ENDING...BCMG VFR ALL
SITES CONTG THRU 18/14Z.

&&

.MARINE...
NO HIGHLIGHTS...NO SIG CHANGES. ATLC RIDGE AXIS S OF LAKE OKEECHOBEE
WILL INTERACT WITH A BROAD TROFFING PATTERN OVER THE ERN SEABOARD TO
GENERATE A GENTLE TO MODERATE W/SW BREEZE THIS AFTN. THE OFFSHORE
COMPONENT WILL GENERATE CHOPPY SHORT PD WIND WAVES...ALBEIT LOW DUE
TO THE LIMITED FETCH. SEA AOB 2FT OVER MOST OF THE LCL ATLC...THOUGH
2-3FT SEAS WILL BE POSSIBLE OVER THE GULFSTREAM. SCT TSRAS MOVING
OFFSHORE THIS AFTN/EVNG...ESP N OF VERO BEACH.

&&

.MLB WATCHES/WARNINGS/ADVISORIES...
FL...NONE.
AM...NONE.

&&

FORECAST/AVIATION...BRAGAW
RADAR/IMPACT WX.....LASCODY

Hazardous weather outlook, Aug 17, 4:58 AM EDT, 7 hours 35 minutes before

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In the hours before

Special weather statement, Aug 17, 12:33 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
1233 PM EDT FRI AUG 17 2012

FLZ045-053-144-171715-
ORANGE-OSCEOLA-SOUTHERN LAKE COUNTY-
1233 PM EDT FRI AUG 17 2012

...A SIGNIFICANT WEATHER ADVISORY IS IN EFFECT FOR STRONG WIND GUSTS
BETWEEN 40 AND 45 MPH OVER SOUTHWESTERN LAKE COUNTY...SOUTHWESTERN
ORANGE COUNTY...NORTHWESTERN OSCEOLA COUNTY...

* UNTIL 115 PM EDT.

AT 1229 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
NARROW LINE OF STORMS CAPABLE OF PRODUCING STRONG WIND GUSTS FROM 10
MILES SOUTHWEST OF MASCOTTE TO 20 MILES SOUTHWEST OF INTERCESSION
CITY...MOVING NORTHEAST AT 15 MPH.

LOCATIONS IN THE PATH OF THE STORM WHICH MAY EXPERIENCE STRONG WINDS
INCLUDE ANIMAL KINGDOM...CLERMONT AND LAKE LOUISA.

THE PRIMARY THREAT WILL BE CLOUD TO GROUND LIGHTNING STRIKES AND
GUSTY WINDS OF 40 TO 45 MPH. HEAVY RAINFALL WILL TEMPORARILY REDUCE
VISIBILITY. SEEK SHELTER INDOORS UNTIL THE STORM PASSES. BOATERS ON
INLAND LAKES SHOULD HEAD TO SHORE.

LAT...LON 2865 8196 2874 8180 2852 8155 2828 8140
      2820 8153 2826 8156 2826 8166 2834 8167
      2834 8179 2836 8180 2836 8185 2834 8186
      2834 8196
TIME...MOT...LOC 1630Z 245DEG 15KT 2848 8201 2831 8187
          2811 8179

RL

The office that day

Everything else NWS Melbourne, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 17, 1:14 PM EDT	Special Weather Statement	MLB	Orange, Seminole	46 min
Aug 17, 1:59 PM EDT	Special Marine Warning	MLB		2 hr
Aug 17, 2:05 PM EDT	Special Weather Statement	MLB	Seminole	40 min
Aug 17, 2:08 PM EDT	Special Weather Statement	MLB	Okeechobee	52 min
Aug 17, 2:25 PM EDT	Special Weather Statement	MLB	Brevard, Osceola	65 min
Aug 17, 2:43 PM EDT	Special Marine Warning	MLB		2 hr
Aug 17, 2:45 PM EDT	Tornado Warning	MLB	Brevard	15 min
Aug 17, 2:58 PM EDT	Special Weather Statement	MLB	Indian River, Okeechobee, Saint Lucie	62 min

Nearby

Special Weather Statements in Florida, 2012 Every special weather statement in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.